HP Carrier-grade cc3300 User Information and Service Guide - HP Carrier-Grade - Page 90

LED Color Selection, System Fault Relays, C Interfaces

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CAUTION Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, boards, and other parts. We recommend that you perform all procedures in this chapter only at an ESD workstation. If one is not available, provide some ESD protection by wearing an antistatic wrist strap attached to chassis ground (any unpainted metal surface) on your server when handling parts. ESD and handling boards: Always handle boards carefully. They can be extremely sensitive to ESD. Hold boards only by their edges. After removing a board from its protective wrapper or from the server, place the board component side up on a grounded, static-free surface. Use a conductive foam pad if available but not the board wrapper. Do not slide board over any surface. LED Color Selection Colors of the ID, disk fault, major alarm, and critical alarm are configurable using 2 position 0.1-inch shunts/jumpers on header J7D1 (see following table). The ID LED may be configured as blue or white. A white ID LED needs shunts across pins 3-4 and 5-6. Table 11-1 Front Panel LED Color Selection (FPIO Board Jumper Settings) Shunt ID blue ID green ID red Critical alarm Disk 0 fault Disk 1 fault Spare Spare Pins 1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 On N/C Green Red Red Yellow Yellow Off Blue Off Off Yellow Red Red System Fault Relays The front panel board contains four relays. These relays are for power, critical, major, and minor alarms. The relays are controlled by the SMBUS. Refer to I2C Interfaces for programming information. System Fault LEDs describes the relay outputs. I2C Interfaces This section describes the programming of front panel board. A PFC8574 remote 8-bit I/O expander on the private I2C bus controls the front panel alarms. All signals are active low. All outputs power up high (inactive). The PFC8574 I2C address is 40 hex (write) and 41 hex (read). On system reset, all ones should be written to PFC8574 since the part does not have a reset pin. Table 11-2 Front Panel Board I2C Interface Input/output Bit Description Bit I/O Name Description 0 O Power alarm Writing 0 turns on the power alarm relay and illuminates the POWER 90 Chapter 8

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90
Chapter 8
CAUTION
Electrostatic discharge (ESD) and ESD protection:
ESD can damage disk drives, boards, and
other parts. We recommend that you perform all procedures in this chapter only at an ESD
workstation. If one is not available, provide some ESD protection by wearing an antistatic
wrist strap attached to chassis ground (any unpainted metal surface) on your server when
handling parts.
ESD and handling boards:
Always handle boards carefully. They can be extremely sensitive
to ESD. Hold boards only by their edges. After removing a board from its protective wrapper
or from the server, place the board component side up on a grounded, static-free surface. Use a
conductive foam pad if available but not the board wrapper. Do not slide board over any
surface.
LED Color Selection
Colors of the ID, disk fault, major alarm, and critical alarm are configurable using 2 position 0.1-inch
shunts/jumpers on header J7D1 (see following table). The ID LED may be configured as blue or white. A
white ID LED needs shunts across pins 3-4 and 5-6.
Table 11-1
Front Panel LED Color Selection (FPIO Board Jumper Settings)
Shunt
Pins
On
Off
ID blue
1-2
N/C
Blue
ID green
3-4
Green
Off
ID red
5-6
Red
Off
Critical alarm
7-8
Red
Yellow
Disk 0 fault
9-10
Yellow
Red
Disk 1 fault
11-12
Yellow
Red
Spare
13-14
Spare
15-16
System Fault Relays
The front panel board contains four relays. These relays are for power, critical, major, and minor alarms.
The relays are controlled by the SMBUS. Refer to I
2
C Interfaces for programming information. System Fault
LEDs describes the relay outputs.
I
2
C Interfaces
This section describes the programming of front panel board.
A PFC8574 remote 8-bit I/O expander on the private I
2
C bus controls the front panel alarms. All signals are
active low. All outputs power up high (inactive). The PFC8574 I
2
C address is 40 hex (write) and 41 hex
(read). On system reset, all ones should be written to PFC8574 since the part does not have a reset pin.
Table 11-2
Front Panel Board I2C Interface Input/output Bit Description
Bit
I/O
Name
Description
0
O
Power alarm
Writing 0 turns on the power alarm relay and illuminates the POWER